Improvement in toy blocks for object-teaching



N. M U LLER Tuy-Blocks for bject-Teaching.

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UNITED STATES i PATENT OFFICE.

NICHOLAS MULLER, OF NEW YORK, N. Y.

IMPROVEMENT IN TOY BLOCKS FOR CBJECT'fTACHING.-

Specification forming part of Letters Patent No. 143,835, dated October21, 1873; application filed J nly 5, 1873.

To all whom it may concern:

Be it known that I, NICHOLAS MULLER, of the city, county, and State ofNew York, have invented a new and useful Improvement in Blocks for Object-Teaching and Amusement, of which the following is a specication:

This invention relates to apparatus designed to-facilitate the study ofgeometry, in the formation of geometrical figures, and to familiarizethe minds of both the young and old with such gures, and also to affordrecreation and amusement; and it consists in two triangularshapedblocks, made of any material and of any size, by the use of which (andno other) various gures are formed by laying them together, ashereinafter described.

In the drawing, Figures 1 and 2 represent the pieces or blocks, bothtriangles, but of different shape and superiicial area.

Fig. 1 has two equal sides, co a, which form an acute angle, b. Thesesides are equal to the two sides c c of Fig. 2, which two sides Thehypotennse of these trianglesis marked d. rlhe'relation of these blocksto veach other is such that when they are placed together, as seen inthe gures from 3 to 7, and in various other combinations not shown inthe drawings, regular geometrical polygons and gures are produced from asimple triangle of the exact form and proportions of Fig. l, as seen inFigs. 4 and 6, to a perfect pentagon, and other and more complicatedgeometrical and ornamental forms of almost endless variety. Instructionand amusement may thus be combined, and the intellectual facultiesexercised in producing the various forms.

The sides of the blocks, Figs. l and 2, may

be of different colors, and may be lplaced so Witnesses T. B. MosHER,ALEX. F. ROBERTS.

